mistake

My colleague (thanks Kevin), just alerted me to a default setting on ESX 4, which I think is potentially dangerous these days.  If you hit Ctrl-Alt-Del on an ESX 4 console, it will reboot the server even if there are running VMs and it doesn’t care if the server is not in Maintenance Mode. This is an old throwback which most modern Linux distribution disable these days.  To disable this yourself, open up /etc/inittab in your favourite editor and comment out the “ca::ctrlaltdel:/sbin/shutdown -t3 -r now” line with a #... [Lire la suite]

I came across some interesting tips on things to consider in a virtualized environment by Greg Shields (Consultant and Microsoft MVP). They are non-issues (or settled issues) on physical environments and you might overlook them when making the transition to virtual machines. Here's a summary to get you interested: Screensavers Managing from the console AV on VM disk files Power options Cluster Failback RAM availability Backup for CSV Number of processors Here are the links to the actual articles: ... [Lire la suite]

Le SANS Institute américain, qui propose études et formations sur les questions de sécurité, a publié récemment une liste de 25 erreurs fréquentes de programmation, sources involontaires de vulnérabilités dans des logiciels, et susceptibles d'être exploitées à des fins malveillantes ou d'espionnage. Cette liste est composée en collaboration avec des experts en sécurité de grandes agences gouvernementales américaines (dont la NSA) et de sociétés du secteur IT telles que Microsoft, Oracle, Red Hat et Apple.  Elle devrait... [Lire la suite]